Dash-pot.



PATBNTED FEB. 21, 1905.

H. J. FISCHER.

DASH POT.

nruonron FILED NOV. 18. 1904.

A %i 2 g l 2 tsa :f I;

Y NyTOR Allorney UNIT D STATES Patented February 21, 1905.

PATENT OFFICE.

HENRY J. FISCHER, OF MONMOUTH, ILLINOIS, ASSIGNOR TO THE MURRAY OFBURLINGTON, IOWA.

DASH-POT.

SPECIFICATION forming part of Letters Patent No. 782,957, dated February21, 1905.

Application filed November 18, 1904. Serial No. 233,289.

To all whom it may concern:

Be it known thatI, HENRY J. Frsonnaa resident of Monmouth, in the countyof Warren and State of Illinois, have invented certain new and usefulImprovements in Dash-Pots; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improved dashpot, the object of the inventionbeing to provide an improved connection between the connecting-rod andthe plunger of the dash-pot which will permit longitudinal movement ofthe rod to compensate for any imperfect adjustment of the parts andprevent breaking of the rod or other mechanism in the event the rod betoo long or too short.

With this object in view the invention consists in certain novelfeatures of construction and combinations and arrangements of parts, aswill be more fully hereinafter described, and pointed out in the claims.

The accompanying drawing is a view in longitudinal section illustratingmy improvements.

1 represents the pot proper, having the two diameters of cylinder, and 2is the plunger therein, made hollow, as shown. In the central upperportion of plunger 2 a two-part bearing 3 4 for the spherical end 5 of aconnecting-rod 6 is secured. The upper member 3 of this hearing fitssnugly in the cylindrical bore of the plunger, has an annular flange 7to receive securing-screws 8, driven into the plunger, and is made witha central flared opening 9 to permit lateral movement of rod 6, whichpasses therethrough.

The lower member 4 of the bearing constitutes a cylindrical blockfitting the cylindrical bore of the plunger and having a semisphericalseat in its top for the end 5 of rod 6, and a strong coiled spring 11 islocated in the lower portion of the plunger and exerts upward 1 pressureon block 4 to normally hold it up and against end 5.

l/Vith my improvements should the Valvegear be so misadjusted that therod 6 descends too far or interferes with the downward motion of someparts of the valve-gear, which often happens, the lower member 4 of thebearing will be depressed, saving all the usual breakage of parts of thevalve-gear, &c.

A great many slight changes might be made in the general form andarrangement of the parts described without departing from my invention,and hence I do not restrict myself to the precise details set forth, butconsider myself at liberty to make such slight changes and alterationsas fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination with a dash-pot, a plunger therein and a plunger-rod,of a ball-andsocket connection between the plunger-rod and plunger, anda spring holding said connection in position and adapted to permit theplunger-rod to yield after the plunger has reached the end of its throw.

2. The combination with a dash-pot, of a plunger therein, a rod, anenlarged end on said rod, a two-member bearing in said plunger for saidenlarged end of the rod, and a spring elastically holding one of saidbearing members.

3. The combination with a dash-pot, of a plunger therein, a rod, aspherical end on said rod, a half-bearing for said spherical end securedto the piston, another half -bearing for said spherical end, and aspring pressing said last-mentioned half-bearing against the sphericalend of the rod.

4. The combination with a dash-pot, of a plunger therein having acylindrical bore, a connecting-rod having a spherical end, a halfbearingfor said spherical end secured in the upper portion of the cylindricalbore of the plunger, a bloelt or half-hearing movable in In testimonywhereof I have signed this the lower portion of the cylindrical bore andspecification in the presence of two subserib- IO having a semispheriealseat for the spherical ing witnesses. end of the connecting-rod, and aspring between the bloek and the end of the plunger HENRY J. FISCHER.

to normally press the block upward and yet Witnesses:

permit it to be forced clown to compensate for R. B. HIOKMAN, nnsaclustinent of parts. B. L. MArEs.

